The 3-in-1 must be set to RAM expansion mode before Opera can use it, and this must be done every time the power is turned off. There is a patch for the browser that does this automatically. You can get it here: http://ezflash.sosuke.com/viewtopic.php?f=8&t=4262

The 3-in-1 must be set to RAM expansion mode before Opera can use it, and this must be done every time the power is turned off. There is a patch for the browser that does this automatically. You can get it here: http://ezflash.sosuke.com/viewtopic.php?f=8&t=4262

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"Place the EU browser (untrimmed/clean) in the dir with the files in this zip
Name it "browser.nds"
Run the batch file"

ok, i did that. copied the modified browser.nds file (aka browser_31.nds) to my sd card, popped it into the nds, and booted it up.

Like I said, the 3-in-1 has to be set to RAM expansion mode before the browser can use it. The patch is supposed to do this as it loads the browser rom, but it may not work with the newer 3-in-1 chipset (introduced around the beginning of '08). It's exactly the same thing that GBA ExpLoader does to the 3-in-1 to make it work with the browser, it just does it automatically instead of requiring an extra step.